Note 8 - Goodwill and Other Intangible Assets - Goodwill (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Dec. 31, 2025	Jun. 30, 2025
Goodwill	$ 153,836	$ 146,685
Goodwill acquired, net of adjustements	(262)	6,769
Foreign currency translation	(197)	382
Accumulated impairment losses	(89,288)	(89,288)
Goodwill, net	64,089	64,548
Lighting Segment [Member]
Goodwill	70,971	70,971
Goodwill acquired, net of adjustements	0	0
Foreign currency translation	0	0
Accumulated impairment losses	(61,763)	(61,763)
Goodwill, net	9,208	9,208
Display Solutions Segment [Member]
Goodwill	82,865	75,714
Goodwill acquired, net of adjustements	(262)	6,769
Foreign currency translation	(197)	382
Accumulated impairment losses	(27,525)	(27,525)
Goodwill, net	$ 54,881	$ 55,340